Didion is among the most acclaimed authors of her generation, but only one of her books has been adapted for film before: the devastating “Play It as It Lays.” Though best known for her nonfiction, like the essay collections “Slouching Towards Bethlehem” and “The White Album,” Didion has written several other novels: “Democracy,” “A Book of Common Prayer,” “Run River.” She also wrote several screenplays with her husband John Gregory Dunne, including “The Panic in Needle Park” and “A Star Is Born.”